Microchip Technology 11AA010T-I/MS

Overview

11AA010T-I/MS from Microchip Technology is a 1 Kbit (128 × 8) serial EEPROM using the UNI/O® single I/O bus interface, operating from 1.8V to 5.5V with 1 mA typical active current and 1 µA max standby current at industrial temperature (–40°C to +85°C). It features Manchester-encoded communication, 16-byte page-write buffer, and hardware write protection for embedded configuration storage in space-constrained applications.

For engineers reviewing the 11AA010T-I/MS datasheet, 11AA010T-I/MS pinout, 11AA010T-I/MS application, or 11AA010T-I/MS equivalent, this device is selected for low-pin-count, ultra-low-power nonvolatile memory in microcontroller-peripheral systems where board area and supply headroom are constrained - especially where legacy I²C/SPI interfaces are unavailable or undesirable.

Technical Context

The 11AA010T-I/MS implements a Manchester-encoded, master-controlled UNI/O® bus protocol over a single bidirectional SCIO line, eliminating separate clock and data lines. Its internal timing recovery circuitry synchronizes to the master's bit period during each start header and re-synchronizes on every MAK edge, tolerating ±0.50% frequency drift per byte and ±0.06 UI input jitter.

It integrates a 16-byte page buffer, STATUS register with WIP/WEL/BP bits, and block write protection (none, 1/4, 1/2, or full array). Write operations are self-timed (max 10 ms), include auto-erase, and require explicit WREN before WRITE or WRSR commands - with automatic WRDI on power-up or successful write completion.

Key Specifications

Pinout & Package

11AA010T-I/MS is housed in an 8-lead MSOP (MS) package - a surface-mount, leaded, thermally enhanced package measuring 3.0 mm × 3.0 mm × 1.0 mm, optimized for automated assembly and moderate thermal dissipation in dense layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial EEPROM applications.

Compared with 11LC010T-I/MS, the 11AA010T-I/MS enables direct 1.8V integration and lower active current, while AT24C01D-SSHM-T trades pin efficiency for broader ecosystem support - making 11AA010T-I/MS optimal for new ultra-low-power, pin-constrained designs.

Availability

11AA010T-I/MS is available at Aetrix Electronics and suitable for industrial control modules, medical handhelds, and smart sensor nodes requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.

Supply support for 11AA010T-I/MS includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and memory solutions for embedded control applications.

The 11AA010T-I/MS belongs to Microchip's UNI/O® EEPROM family, designed specifically to reduce pin count and simplify board layout in resource-constrained embedded systems where traditional serial buses add unnecessary complexity.

FAQ

What is the minimum VCC voltage supported by the 11AA010T-I/MS?

The 11AA010T-I/MS operates down to 1.8V across its full industrial temperature range (–40°C to +85°C), enabling direct interface with 1.8V logic families and ultra-low-power microcontrollers without level translation. Below 1.8V, functionality is not guaranteed per DS22067J specifications.

Does the 11AA010T-I/MS require external pull-up resistors on the SCIO line?

Yes, the 11AA010T-I/MS requires an external pull-up resistor on the SCIO pin to ensure proper bus idle-state voltage and signal integrity. Microchip recommends 10 kΩ for standard-speed operation (100 kHz), with value adjusted based on bus capacitance and speed requirements.

How does the 11AA010T-I/MS handle write protection during power transitions?

The 11AA010T-I/MS incorporates built-in power-on/off data protection: the write-enable latch resets automatically on power-up or brown-out, and the STATUS register's BP bits retain their state through power cycles. This prevents unintended writes during unstable supply conditions.

Can the 11AA010T-I/MS be used alongside other UNI/O® devices on the same SCIO bus?

Yes - the 11AA010T-I/MS uses a hardwired device address of 0xA0 (1010 0000), allowing multiple 11AA/11LC devices with different suffixes (e.g., 11AA010, 11AA020) to coexist on one UNI/O® bus, provided their device codes differ (0000 vs. 0001 for 11XX1 variants).

What is the maximum bit rate of the UNI/O® interface on the 11AA010T-I/MS?

The 11AA010T-I/MS supports a maximum serial bus frequency of 100 kHz, corresponding to a 10 µs minimum bit period (TE). This rate is compatible with low-cost MCUs running at modest clock speeds and ensures reliable operation under EMI-prone industrial conditions.